Enhanced Adaptive Data hiding in DWT

Abstract

security of the data on internet can be obtained by the steganography. It is combination of science and art for hiding the data or information in cover medium. So, that observer cannot arouse suspicious. In this regards Discrete Wavelet Transform (DWT) plus adaptive quantization are the effective tools for enhancing the cover media visual quality and hence attracts much attention in recent years. In this paper the steganography technique which embeds the secret messages in frequency domain after DWT and adaptive quantization. To improve steganography parameters such as embedding capacity and visual quality of cover media. Here, embedding capacity changes over techniques and quality can be measured with Peak Signal Noise Ratio (PSNR) and Human Visual System (HVS).